Author: Mihaly Szalai
Date: 13:56:42 06/02/04
Go up one level in this thread
On June 02, 2004 at 14:39:41, Derek Paquette wrote: >I analyzed this game a little further, and I do not think that nxf1 is the move >that cost the program the game, > >i think that 21. b5 is what costs Crafty the game, after that, all programs that >i analyze with spike in favour of white, or equal. Then after each move, the >analysis runs wild, > >instead of 21.b5 >r1r2bk1/1pq2p1p/p1b1pPp1/3pP3/P2B4/2N4Q/1PP1B1PP/5R1K b - - 0 21 > > >bxa4 is much better, and things fall apart for white after that, Shredder 8 and >Deep fritz 8 agree > Hi Derek, thans for the idea, but the analysis is suspicious. >New game - Shredder 8, Blitz:10' home [D]r1r2bk1/1pq2p1p/p1b1pPp1/3pP3/P2B4/2N4Q/1PP1B1PP/5R1K b - - 0 1 > >Analysis by Deep Fritz 8: > > ³ (-0.64) Depth: 13/37 00:02:32 103687kN >21...Bxa4 22.Nxa4 Qxc2 23.Nc3 Rxc3 24.Qxc3 Qxe2 25.Re1 Qg4 26.Rc1 Bh6 > µ (-1.16) Depth: 13/39 00:02:51 118377kN >21...Bxa4 22.Nxa4 Qxc2 23.Nc3 Rxc3 24.Qxc3 Qxe2 25.Re1 Qg4 26.Ra1 a5 > µ (-1.23) Depth: 14/37 00:04:00 169092kN >21...Bxa4 22.Bd1 Qc4 23.Rf4 Bc6 24.Be3 d4 25.Bxd4 Qb4 26.Rh4 h6 > µ (-1.16) Depth: 15/38 00:06:13 272643kN 21...Bxa4 22.Bd1 Qc4 23.Rf4 Bc6 24.Be2! however 23...Bb5! looks good. >New game - Shredder 8, Blitz:10' home >r1r2bk1/1pq2p1p/p1b1pPp1/3pP3/P2B4/2N4Q/1PP1B1PP/5R1K b - - 0 1 > >Analysis by Shredder 8: > > >21...Bxa4 22.Bd3 Bd7 23.Rf4 b5 24.Rh4 h5 25.Rxh5 gxh5 26.Qxh5 Bc5 > -+ (-2.06) Depth: 18/37 00:03:27 23226kN That's the most interesting! 21... Bxa4 22.Bd3 Bd7? 23.Rf4 b5?? 24.Rh4 h5 25.Rxh5 gxh5 26.Qxh5 Bg7 27.Qh7+ Kf8 28.Qxg7+ Ke8 29.Qg8# 23...Bb5! again. Let me add that Crafty doesn't find 21...Bxa4 in reasonable time: Crafty-19.13 WB2 56 MB: 7 00:00 1,64 b7b5 a4xb5 a6xb5 Nc3xb5 Bc6xb5 Be2xb5 Qc7xc2 Bb5d7 Rc8c4 8 00:00 1,41 b7b5 a4xb5 a6xb5 Nc3xb5 Bc6xb5 Be2xb5 Qc7xc2 Bb5d3 Qc2d2 Rf1b1 8 00:02 1,48 Qc7d7 Rf1a1 b7b5 a4xb5 a6xb5 Ra1xa8 Rc8xa8 Kh1g1 Ra8a1+ Be2f1 b5b4 9 00:03 1,47 Qc7d7 a4a5 Bc6b5 Rf1e1 Bb5xe2 Re1xe2 Rc8c6 Re2e1 Bf8b4 Re1a1 9 00:05 1,56 b7b5 a4xb5 a6xb5 Be2d3 b5b4 Nc3e2 Ra8a2 Ne2c1 Ra2a1 Kh1g1 10 00:09 1,66 b7b5 a4xb5 a6xb5 Nc3xb5 Bc6xb5 Be2xb5 Qc7xc2 Qh3g4 Bf8c5 Bb5d7 Rc8c7 Rf1f2 11 00:19 1,65 b7b5 a4xb5 a6xb5 b2b3 b5b4 Nc3d1 Ra8a2 Nd1e3 h7h6 Kh1g1 Rc8a8 Qh3g4 12 01:33 0,19 b7b5 Rf1f4 Qc7d8 Rf4h4 h7h6 Bd4e3 d5d4 Rh4xd4 Qd8c7 a4xb5 a6xb5 Be3f4 b5b4 12 02:17 0,31 Qc7d7 Rf1f4 Bc6xa4 Rf4h4 h7h5 Nc3xa4 Qd7xa4 Be2xh5 Rc8c6 Bh5d1 Bf8h6 Kh1g1 Qa4c4 12 05:42 0,82 Qc7a5 Rf1f4 Qa5b4 Rf4h4 h7h6 Rh4xh6 Bf8xh6 Qh3xh6 Qb4f8 Qh6d2 b7b6 Kh1g1 Qf8b4 b2b3 13 08:06 0,91 Qc7a5 Rf1f4 Qa5b4 Rf4h4 h7h6 Rh4xh6 Bf8xh6 Qh3xh6 Qb4f8 Qh6d2 Kg8h7 Kh1g1 Qf8h6 Bd4e3 Qh6h4 Mihaly
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